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License
    This file is part of OpenFOAM.

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    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

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    You should have received a copy of the GNU General Public License
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Class
    Foam::turbulentDispersionModels::LopezDeBertodano

Description
    Lopez de Bertodano (1992) turbulent dispersion model.

    \verbatim
        "Turbulent bubbly two-phase flow in a triangular
         duct"
        Lopez de Bertodano, M.
        Ph.D. Thesis, Rensselaer Polytechnic Institution, New York, USA, 1992.
    \endverbatim

    \verbatim
        "The Favre averaged drag model for turbulent dispersion in Eulerian
         multi-phase flows"
        Burns, A.D., Frank, T., Hamill, I., Shi, J.M.,
        5th international conference on multiphase flow
        Volume 4, Paper 392, May 2004
    \endverbatim

SourceFiles
    LopezDeBertodano.C

\*---------------------------------------------------------------------------*/

#ifndef LopezDeBertodano_H
#define LopezDeBertodano_H

#include "turbulentDispersionModel.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

class phasePair;

namespace turbulentDispersionModels
{

/*---------------------------------------------------------------------------*\
              Class LopezDeBertodano Declaration
\*---------------------------------------------------------------------------*/

class LopezDeBertodano
:
    public turbulentDispersionModel
{
    // Private data

        //- Constant turbulent dispersion coefficient
        const dimensionedScalar Ctd_;


public:

    //- Runtime type information
    TypeName("LopezDeBertodano");


    // Constructors

        //- Construct from a dictionary and a phase pair
        LopezDeBertodano
        (
            const dictionary& dict,
            const phasePair& pair
        );


    //- Destructor
    virtual ~LopezDeBertodano();


    // Member Functions

        //- Turbulent diffusivity
        //  multiplying the gradient of the phase-fraction
        virtual tmp<volScalarField> D() const;
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace turbulentDispersionModels
} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
